The first popular sign of a concussion is a headache. It feels like a headache in consequence of a head injury. The level of pain may change: from the mildest to the severest. A headache is usually harsh when it is a concussion. Throbbing ache and pressure simply drive the patients mad. Not just a single field of the head feels that – looks like the symptom covers the entire part of the body. Moreover, the pain may move down to the neck and upper extremities.